A PR interval of less than 0.12 seconds indicates:
A) an intermittent blocking of the impulse as it passes through the AV node.
B) an increased rate of impulse discharge from the SA node.
C) a pacemaker site which is either in or close to the AV junction.
D) a delay in conduction of the impulse between the SA node and the ventricles.
Correct Answer:
Verified
Q1: You have determined the heart rate and
Q2: The PR interval is the distance from
Q3: A normal PR interval:
A) is usually present
Q4: The PR interval is normally _ to
Q6: A PR interval of greater than 0.20
Q7: PR intervals are considered normal if they
Q8: Shorter than normal PR intervals may be
Q9: Preexcitation:
A) leads to a delayed depolarization of
Q10: When a P' follows the QRS complex
Q11: The most common cause of longer than
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